#!/usr/bin/env python
# coding:utf-8
import requests

class HttpClient(type):
    _http_client = requests.Session()
        
    @classmethod
    def Request(cls, url, body):
        response = '{"errcode":2200, "rtval":null}'
        try:
            response = cls._http_client.post(url, data= body).text
        except Exception as e:
            print("Exception:", e)
        return response
